Such things are certainly all over the internet, often in the writings of people who are clearly well past their student days:
Would of like to of come, but I'll still be in West Palm Beach.
Just would of like to of seen the World of Tanks and the Museum get a little more exposure.
I would of like to of seen a playmaker in there at least somewhere in midfield,
But the fact is, traditional spelling aside, "I would of like to of seen it" is exactly how I pronounce the phrase myself.
Some of the examples that turn up on the web underline the mainstream character of this pattern.
Consider this review on urbanspoon.com of a restaurant in Portland OR:
This is a very quaint little restaraunt with incredibly great food and a dessert menu that would be the envy of any top pastry shop in Paris! Great place for a special lunch or business lunch.
Everything on menu is made fresh and to order.
The selections are unique items, with bold flavors and quality ingredients.
I got the Croque Monsieur sandwich which was Black Forrest Ham, Gruyere Cheese, on toasted Parmesan crusted bread. The sandwich was served very warm, with cheese perfectly melted. It was delightful!
Instead of Fries I got the House Salad. It was very large with hazel nuts and mixed greens. Dressing was light and would of like to of had just a bit more.
Dining partner got the Mediterranean Vegetable Sandwhich. Served on ciabatta bread and it was bursting with flavor.
Fondue appetizer was almost a meal in itself! A rich, creamy crock pot of bold tasting cheese fondue accompanied by apple slices, asparagus and homemade bread slices. The bread's texture was just full of little nooks and crannies that just sopped up and captured the fondue cheese! Yummy!
Have only eaten here for lunch, but would love to try dinner sometime.
And if you go, save room for desert! I didn't and wish I had!
Or this interview with "British action star Mem Ferda" (where the choice of spelling is the transcriber's, of course):
Q: Are there any roles you would of liked to of played?
A: I would of like to of played Stanley Kowalski in A Streetcar Named Desire, Travis Bickle in Taxi Driver, and Jake La Motta in Raging Bull. In my later years, I would like to be Shakespeare’s King Lear at The Globe.
Or this comment at the Cleveland Plain Dealer site, on a photo showing the city council president holding a coat over his head:
Yes, yet another one of those special candid 'keeper' photos by the outstanding PD photographer Marvin Fong. I'm still chuckling whenever I see it because so many times many of us would of like to of put a muzzle and/or a bag over PIG Big Daddy's mouth/head; so he finally obliged us! However, sure wish that he would of taken the stand as it would of been a howl to see when eventually he couldn't contain himself when angered and would go off ranting all his vulgar obscenities!